小数方程计算专项练习题

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小数方程计算专项练习题

小数方程专项练(有答案)

1.(x + 0.55) × 4 = 3.6

2.2x ÷ 8 = 0.8

3.1.5 × 2 + 2x = 5

4.4.7x = 1.9x + 7

5.12.6(x + 4.8) ÷ 2 = 63

6.12.5 + 4x = 21.7

7.13.5x - 8.5x = 20

8.6x - 8.5 × 4 = 20

9.36 ÷ x = 0.4

10.9.6x - x = 43

11.3x - 4 × 0.9 = 46.2

12.3.5x - 4 × 7 = 42

13.x - 0.9x = 81.9

14.3.8 + 5x = 12.3

15.4(0.3 + x) = 6.8

16.8x - 1.6x = 19.2 17.x ÷ 1.8 = 1.62

18.22.5 × 2 + 5x = 135

19.1.4x + 9.8 = 22.4

20.2(x - 3) = 11.6

21.68 - 4.4x = 24

22.1.6 × 8 - 5x = 2.3

23.2.5x ÷ 20 = 16

24.6.2x - x = 41.6

25.x ÷ 0.5 = 48.6 × 2

26.5x - 7.8 = 20.2

27.2.5x - x = 1.8

28.(4.5 + x) × 2 = 13

29.7x - 2 × 9 = 80

30.13x - 7.5x = 18.7

31.(x + 12) × 6 = 108

32.4x + 3 × 0.7 = 6.5

33.2(x - 0.5) = 1.6

34.3x × 2.34 = 4.914

35.1.44 ÷ x = 0.4

36.2x + 6 = 12.5 37.2.5x - x = 1.2

38.(4.5 + x) × 2 = 63

39.2x - 2.5 × 10 = 15

40.3.85 + 1.5x = 6.1

41.13(x + 2.5) = 169

42.2x - 2 + 1.8 = 3.6

43.7(x - 1.2) = 3.57

44.2 + 1.8 - 2x = 3.6

45.7x ÷ 0.3 = 4.2

46.6x + 4x - 11 = 32.9

47.7(x - 1.2) = 2.87

48.2.4 + 3.4x = 5.8

49.5(x - 1.2) = 35

50.2.5x + 51 = 17 × 8

51.2.4x + 1.6x = 2.2

52.8(x - 6.2) = 41.6

53.0.5(x - 0.5) = 7.5

54.(9x + 1.5 + 7x) ÷ 5 = 5.1

55.3x + 7 = 29.5

56.5x - 2.8 × 1.2 = 1.04 57.4x + 6x = 28.5

小数方程专项练(附答案)

1.解:(x + 0.55) × 4 = 3.6

x = (3.6 ÷ 4) - 0.55

x = 0.175

2.解:2x ÷ 8 = 0.8

x = 0.8 × 8 ÷ 2

x = 3.2

3.解:1.5 × 2 + 2x = 5

2x = 5 - 3

x = 1

4.解:4.7x = 1.9x + 7

2.8x = 7

x = 2.5

5.解:12.6(x + 4.8) ÷ 2 = 63

x + 4.8 = 10

x = 5.2

6.解:12.5 + 4x = 21.7

4x = 9.2

x = 2.3

7.解:13.5x - 8.5x = 20

5x = 20

x = 4

8.解:6x - 8.5 × 4 = 20

6x = 20 + 34

x = 9

9.解:36 ÷ x = 0.4

x = 36 ÷ 0.4

x = 90

10.解:9.6x - x = 43

8.6x = 43

x = 5

11.解:3x - 4 × 0.9 = 46.2

3x = 46.2 + 3.6

x = 16.6

12.解:3.5x - 4 × 7 = 42

3.5x = 42 + 28

x = 20

13.解:x - 0.9x = 81.9

0.1x = 81.9

x = 819

14.解:3.8 + 5x = 12.3

5x = 12.3 - 3.8

x = 1.7

15.解:4(0.3 + x) = 6.8

1.2 + 4x = 6.8

4x = 5.6

x = 1.4

16.解:8x - 1.6x = 19.2

6.4x = 19.2

x = 3

17.解:x ÷ 1.8 = 1.62

x = 1.62 × 1.8

x = 2.916

18.解:22.5 × 2 + 5x = 135

5x = 135 - 45

x = 18

19.解:1.4x + 9.8 = 22.4

1.4x = 22.4 - 9.8

x = 9

20.解:2(x - 3) = 11.6

2x - 6 = 11.6

2x = 17.6

x = 8.8

21.解:68 - 4.4x = 24

4.4x = 68 - 24

x = 11

22.解:1.6 × 8 - 5x = 2.3

12.8 - 5x = 2.3

5x = 10.5

x = 2.1

23.解:2.5x ÷ 20 = 16

2.5x = 20 × 16

x = 32

24.解:6.2x - x = 41.6 5.2x = 41.6

x = 8

25.解:x ÷ 0.5 = 48.6 × 2

x = 48.6 × 2 ÷ 0.5

x = 194.4

26.解:5x - 7.8 = 20.2

5x = 28

x = 5.6

27.解:2.5x - x = 1.8

1.5x = 1.8

x = 1.2

28.解:(4.5 + x) × 2 = 13

9 + 2x = 13

2x = 4

x = 2

29.解:7x - 2 × 9 = 80

7x = 80 + 18

x = 14

30.解:13x - 7.5x = 18.7

5.5x = 18.7

x = 3.4

31.解:(x + 12) × 6 = 108

6x + 72 = 108

6x = 36

x = 6

32.解:4x + 3 × 0.7 = 6.5

4x = 6.5 - 2.1

x = 1.1

33.解:2(x - 0.5) = 1.6

2x - 1 = 1.6

2x = 2.6 x = 1.3

34.解:3x × 2.34 = 4.914

x = 4.914 ÷ 7.02

x = 0.7

35.解:1.44 ÷ x = 0.4

x = 1.44 ÷ 0.4

x = 3.6

36.解:2x + 6 = 12.5

2x = 6.5

x = 3.25

37.解:2.5x - x = 1.2

1.5x = 1.2

x = 0.8

38.解:(4.5 + x) × 2 = 63

9 + 2x = 63 ÷ 2 9 + 2x = 31.5

2x = 22.5

x = 11.25

39.解:2x - 2.5 × 10 = 15

2x = 15 + 25

x = 20

40.解:3.85 + 1.5x = 6.1

1.5x = 6.1 - 3.85

x = 1.1

41.解:13(x + 2.5) = 169

13x + 32.5 = 169

13x = 136.5

x = 10.5

42.解:2x - 2 + 1.8 = 3.6

2x = 3.6 + 0.2

x = 1.9

43.解:7(x - 1.2) = 3.57

7x = 3.57 + 8.4

x = 1.77

44.解:2 + 1.8 - 2x = 3.6

2x = 3.6 - 3.8

x = -0.1

45.解:7x ÷ 0.3 = 4.2

x = 4.2 × 0.3 ÷ 7

x = 0.18

46.解:6x + 4x - 11 = 32.9

10x = 43.9

x = 4.39

47.解:7(x - 1.2) = 2.87

7x = 2.87 + 8.4

x = 1.51